Yes, of course the 43x is slimmer. The 43x and the PX4CC are similar in size profile-wise and the PX4CC’s weight is a lot closer to the 43x than the 92C. The slide and frame width of the PX4CC is very close to a G19. The PX4CC is kind of deceptive, almost an optical illusion, as it looks a lot more chunky than it actually measures. It was originally designed to eat a steady diet of high pressure 40S&W. It’s impressively durable in 9mm as Ernest proved.
Having said all of that, this is a 92C thread, and I do dig my 92X C compact with all of the LTT upgrades greatly. I prefer to carry the PX4CC with all of the LTT upgrades because for me it’s more portable, concealable, comfy when carrying all day.